This is a visual inspection to see what I'm up against. So without delay lets get into it.

Disassembly: First remove the foil around the rear of the bezel. Unthread the large black ring on the back of the connector. There is a large O-ring that will come out after the back has been removed. The RMI internally is divided into six sections. I have described them from Front Face to the Rear Connector. This is just to inspect the unit and see what I will have to plan for, as of yet I still have not found/received any documentation, so in a way, I'm just sort of spitting in the wind. You will please notice that I have removed the supports from the connector assembly so it just sort of hangs there. At this time I am not willing to dive deeper into the RMI, for fear of producing damage. As you will see in image number 4. The green wire has broken loose of the black motor. I guess I will have to repair it.

Item

Sections

Subsections

Manufacture

Manufacture Part Number

Collins Part Number

NSN

1.

Front Face

a

The following Drivers are involved with Compass Card Movement

b

3b, 3c, 5a, 5b, 5c

c

Front Pointer

d

Rear Pointer

e

ADF/VOR Switch Right

f

ADF/VOR Switch Left

g

+/- Adjustment

h

FLAG 'OFF'

i

Indicator

2.

Rear Pointer Drive & Flag Motors

a

Synchro Rx

Litton/Clifton

URH-11-CM-4/F470

602894-2

5990-00-253-0261

b

Indicator Motor

Jewel

241004-103

c

Flag Motor

Jewel

3

Drives & Switches

a

Control Transformer (has external slip rings)

Litton/Clifton

CTH-10-ES-05/A216

739681-1

b

Transformer

Litton/Clifton

1779939-3

c

Transformer (Front Pointer Drive)

Litton/Clifton

CRH-10-PS-4/B211

739830

5990-00-951-8283

d

Tachometer, ST10131

Cedar Engineering

e

Switch (S301 - Left)

Clarostat

CM31783

1755098

5930-00-127-5586

f

Switch (S301 - Right)

Clarostat

CM31783

1755098

5930-00-127-5586

4.

Gears

5.

Rear Drives

.a

Synchro Tx #3406 (large Gold Cans)

Sunbeam Electric

4022-02

5990-00-504-6032

.b

Synchro Tx #9980 (large Gold Cans)

Sunbeam Electric

4022-02

5990-00-504-6032

.c

Synchro

Litton/Clifton

CTH-11-PS-9

610528-4

5990-00-557-7443

6.

Connector System

.a

Connector 55 pin connector numbered 1-55

.b

Flex circuit PCB holding two (2) green termination plates for wires

.c

Green Termination Board 10x2

Winchester Electronics

MBD10-2-53

5940-00-006-2944

.d

Green Termination Board 10x5

Winchester Electronics

MBD10-5-53

5940-00-617-1341

Notes:

Numbers in BOLDare printed on the part

Numbers not in bold have been cross-referenced and looked up.

Litton/Clifton is now part of MOOG

Sunbeam Electric is now part of MOOG

And Now the photos

The Rear Pointer Drive Synchroimage 1

One of the ADF/VOR switchesimage 2

image 3

image 4

image 5

Tachometer and Front Drive Synchroimage 6

Close up of the front pointer drive shaft.image 7

The business end of the RMIimage 8

image 9

Updates:

Attack of the Blond Moment on the RMI it says "Honeywell" ie Sperry 25 Sept 2018